LinkedIn Sr. Software Engineer interview questions

Approached by a recruiter lady and she was quick to put me into a phone screen. I had first phone conversation with 2 engineers. They were both young and inexperienced. I did my best but , interviewers were not really fit (they called me late, they didn't really understand the technical differences between basic data structures etc). Also they tried to ask two question, after calling in late and spending some time with resume, and trying to get a specific answer in their mind, but one of the question was an open ended design question, there is no single answer. The next business day recruiter lady called me and told 'Hiring committee realized my interview was not conducted properly and LinkedIn would like to fix it'. LinkedIn wanted to renew the phone screening. I was not sure after first bad experience, but then I changed my mind and wanted to explore. Next next day, recruiter seems to have changed her mind, once again, she sent me an email with asking "do I really want this second phone screen, since I have offers from other companies like Amazon, FB. For some reason, among all other companies LinkedIn was the worst of all. Their so-called senior engineers have a few years industry experience, recruiter keep having second thoughts. At least my experience was consistently bad. Luckily coming from Microsoft, going to another big competitor, LinkedIn didn't put a dent in my career, and I am appalled by level of unprofessional-ism.

First Telephonic Round: Was cool, Interviewer asked two coding questions directly after introduction, asked to use collabedit. coding questions were quite common & can be found in career cup/glass door/leetcode etc. Make sure to finish first question fast & as correct as you can becoz it is the first impression you can make also you will get more time for second one. In my case I couldn't solved 2nd problem completely but my approach was correct. Onsite Round: Good experience, Started with small campus tour ended in huddle room reserved & personalized for you. Greeted with recruiting manager who gave brief overview of all the upcoming rounds, talked about what they are expecting in each of round which was very useful. Two coding round, One System Design, One Project Manager, One Current Project and one lunch round. 1st Coding round: Basic Tree question with lots of variations added during the interview. Focused on coding skills was more so make sure write code which can handle as much as edge cases. Since problem was pretty basic so Interviewers keep changing /adding variation to it. 2nd Coding round: Very tough question however as told by recruiter & interviewer in this round focus was more of problem solving skills rather than writing complete code. Got sufficient hints however I couldn’t solved NP-hard problem fully. Project Manager Round: Resume scan, Close review of your career growth and what you have achieved. Be ready to project your achievement as coder and handle questions like why linkedin. This was the only round where I was not standing & doing white boarding ;-) System Design Round: As expected this was focused on your design questions, interviewer was expecting to consider all aspect while designing a system like storage, concurrency, scaling & performance etc. I got very famous system design question which was quite common. Current Project Round: Nothing special expect some additional questions like ideal ways to ensure code quality. Lunch Round: Nothing special , good food choice, this is the round where you can clear your doubts regarding linkedin. Overall good experience , however after one week I am still waiting on feedback/result from recruiters anyways I am considering this as no offer. Good Luck!.